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DevSecOps Terraform Code - Explained

Overview​

With our environments configured and secrets created, it's time to dive into the Terraform code that defines the DevSecOps pipeline infrastructure. This guide provides a detailed explanation of the critical components so you can fully understand how the system works.

Code Overview​

All relevant code is located in the terraform folder, which contains multiple Terraform modules:

  1. Core Infrastructure
  2. CI/CD Pipelines

Core Infrastructure​

This module provisions foundational infrastructure components such as storage, artifact registry, and secret management. It ensures that essential resources are available for secure DevSecOps operations.

  • Files:
    • main.tf: Defines storage buckets, artifact registries, and secret management resources.
    • variables.tf: Configures input variables, including project ID and region.
    • provider.tf: Configures the Google Cloud provider settings.

CI/CD Pipelines​

This module sets up Cloud Build pipelines, IAM roles, and GitHub integration for CI/CD automation. Below are the key elements explained in detail:

Artifact Registry Configuration​

  • Resource: google_artifact_registry_repository
  • Purpose:
    • Provisions a Docker artifact repository for storing container images.
    • Ensures that all built images are stored securely and version-controlled.
    • Enables seamless integration with Google Cloud Build for CI/CD pipelines.

Cloud Storage Bucket Configuration​

  • Resource: google_storage_bucket
  • Purpose:
    • Provisions a Cloud Storage bucket for storing Cloud Build artifacts.
    • Standardizes bucket naming conventions using variables.
    • Ensures secure and centralized storage for build and deployment artifacts.

Secret Management Configuration​

  • Resource: google_secret_manager_secret
  • Purpose:
    • Stores sensitive information such as API tokens securely.
    • Manages access control for secrets using IAM policies.
    • Ensures integration with Cloud Build and other services.

FastAPI Pipeline Configuration​

  • Module: gcp_python_fastapi_pipeline
  • Purpose:
    • Establishes a CI/CD pipeline for the "GCP FastAPI" project.
    • Leverages the GitHub connection to pull source code from the repository.
    • Integrates the pipeline with the Cloud Storage bucket and Artifact Registry for seamless deployments.

Key Pipeline Parameters​

  • GitHub Integration:
    • Dynamically links the GitHub connection to Cloud Build triggers.
    • Configures repository details:
      • Repository: The-DevSec-Blueprint/gcp-python-fastapi
      • Branch: main
  • Build and Deployment:
    • Buildspec: Located at cloudbuild.yaml.
    • Build environment:
      • Machine type: E2_SMALL
      • Image: gcr.io/cloud-builders/gcloud
      • Privileged mode enabled for containerized builds.
  • Security Scanning:
    • Integrates Snyk for container security scanning.
    • Uses SNYK_TOKEN and project_id variables for authentication.

By understanding the purpose and structure of these Terraform configurations, you'll have a clearer picture of how the DevSecOps pipeline functions, from provisioning infrastructure to enabling secure and automated CI/CD workflows.